Why choose foam board insulation?
Owens Corning FOAMULAR® NGX® 350 CVI is a high strength Extruded Polystyrene (XPS) Insulation product designed to be used in protected membrane roof assemblies. It has drainage channels to facilitate water drainage in roofing assembly.
Performance Criteria
DIMENSION | PROPERTY | TEST METHOD |
|---|---|---|
COMPLIANCE: | Evaluation Listing No. 13430-L | CCMC |
| Type 4 | CAN/ULC-S701.1-17 | |
| PHYSICAL PROPERTIES: | Compressive Strength1: 35 psi (240 kPa) | ASTM D1621 |
Compressive Modulus: 1480 psi (10204 kPa) | ASTM D1621 | |
Flexural Strength2: 80 psi (552 kPa) | ASTM C203 | |
Dimensional Stability, Maximum, % linear change: 1.5 | ASTM D2126 | |
Linear Coefficient of Thermal Expansion: 3.5x10–⁵ in/in./°F (6.3x10–⁵ mm/mm/°C) | ASTM E228 | |
MOISTURE: | Thermal Resistance, R-Value, hr•ft²•°F Btu (RSI, °C•m²/W) /5.0 (0.88) @ 24°C (75°F) mean temperature 5.4 (0.95) @ 4.4°C (40°F) mean temperature 5.6 (0.99) @ -3.9°C (25°F) mean temperature | ASTM C518 or C177 |
LTTR: | See data sheet for values | CAN/ULC-S770-15 |
| MOISTURE: | Water Absorption, (max. % by volume): 0.30 | ASTM D2842 |
Water Vapour Permeance: > 0.3 Perms (17 ng/Pa.s.m²) | ASTM E96 | |
Water Capillarity: None | - | |
Water Affinty: Hydrophobic | - | |
Limiting Oxygen Index, min.: 24 | ASTM D2863 | |
| FIRE: | Combustible | CAN/ULC-S114 |
Max. Service Temp. 74 °C (165 °F) | - | |
FM Approval Standard | 4470 |
